Abstract

Nodular graphitic cast iron (FCD) is classified as ductile cast iron. FCD plays many important roles in its technical applications, as it is found in the field of heavy machinery, automotive, construction, etc. The low yield value in its manufacturing process, particularly in the casting process, has been taken as the background for this research. The objectives for this research is to analyze the effect of modulus size and pouring temperature to the shrinkage value of the casting, which can subsequently be used to determine the proper modulus of casting part and the pouring temperature for a riserless sound casting. This research was held in Foundry Laboratory at Bandung Polytechnic for Manufacturing. It starts with the determination of green sand mold properties and the chemical composition of FCD 500. The theoretical liquidus temperature and superheat of 100 0C is used as the lower limit of the pouring temperature. The modules varies between 0.5 cm and 2 cm. To analyze the influence of modules and pouring temperature, trials have been done by casting FCD cubes. Meanwhile other parameters have been held constantly during the process. Testing for this samples comprises dimension test, visual test, and specific weight test. The research conclude that sound casting of FCD 500 can be produced without applying any riser for the maximum modulus of 0,5 cm and the pouring temperature of 1.270 0C – 1.355 0C.

Full Text